Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | Material Forming ESAFORM 2014 |
| Seiten | 212-220 |
| Seitenumfang | 9 |
| Publikationsstatus | Veröffentlicht - 23 Mai 2014 |
| Veranstaltung | 17th Conference of the European Scientific Association on Material Forming, ESAFORM 2014 - Espoo, Finnland Dauer: 7 Mai 2014 → 9 Mai 2014 |
Publikationsreihe
| Name | Key Engineering Materials |
|---|---|
| Band | 611-612 |
| ISSN (Print) | 1013-9826 |
| ISSN (elektronisch) | 1662-9795 |
Abstract
On component-side the process limits of bulk metal forming processes are limited by defects in parts, like folds or cracks. Considering the time and cost aspect, the complexity of forged parts and the demands for quality are increasing. Therefore it is inalienable to detect failures in parts in earlier production process stages, to avoid additional costs and loss of time. In bulk metal forming processes forging folds, which predominantly occur at the equatorial section in upsetting processes of hollow parts, are less investigated in comparison with folds in sheet metal forming process. Some previous studies already showed the main influences on the formation of forging folds and process limits using processes, in which forging folds occur predominantly [1, 2, 3]. More studies were carried out on investigations with focus on numerical identifications of folds [1,4]. In one of these studies i.a. at the Institute of Forming Technology and Machines an algorithm was developed and implemented in a commercial FE-Software-System, which is able to detect forging folds in bulk metal forming processes. However, the algorithm is only valid for two-dimensional models. In this work, the numerical approach is transferred to the three-dimensional case, to investigate the accuracy and validation of the previous results to establish a base for further investigations. The determined influences on the formation of forging folds are investigated for three-dimensional fold formation and compared with the experimental results. Further investigations on the factors, which lead to forging folds, were carried out numerically and experimentally. Here the numerical results were validated by means of metallographic microsection of the forged parts, whereby the material flow and the geometric characteristics of folds were considered. The results of this work serves as a basis for an automatic optimization of the process-parameters to prevent formation of forging folds. This will be realized by an optimization tool, which is nowadays integrated in commercial FE software systems. Thus, it should be possible to individually optimize the process, so that failures in parts can be avoided. Furthermore the results of this work serve also as basis for further investigations on a better friction modeling comparing classic friction models with the IFUM-friction model..
ASJC Scopus Sachgebiete
- Werkstoffwissenschaften (insg.)
- Allgemeine Materialwissenschaften
- Ingenieurwesen (insg.)
- Werkstoffmechanik
- Ingenieurwesen (insg.)
- Maschinenbau
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- Apa
- Vancouver
- BibTex
- RIS
Material Forming ESAFORM 2014. 2014. S. 212-220 (Key Engineering Materials; Band 611-612).
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review
}
TY - GEN
T1 - Numerical and experimental investigations on fold formation in forged parts
AU - Behrens, B. A.
AU - Matthias, T.
AU - Kazhai, M.
N1 - Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2014/5/23
Y1 - 2014/5/23
N2 - On component-side the process limits of bulk metal forming processes are limited by defects in parts, like folds or cracks. Considering the time and cost aspect, the complexity of forged parts and the demands for quality are increasing. Therefore it is inalienable to detect failures in parts in earlier production process stages, to avoid additional costs and loss of time. In bulk metal forming processes forging folds, which predominantly occur at the equatorial section in upsetting processes of hollow parts, are less investigated in comparison with folds in sheet metal forming process. Some previous studies already showed the main influences on the formation of forging folds and process limits using processes, in which forging folds occur predominantly [1, 2, 3]. More studies were carried out on investigations with focus on numerical identifications of folds [1,4]. In one of these studies i.a. at the Institute of Forming Technology and Machines an algorithm was developed and implemented in a commercial FE-Software-System, which is able to detect forging folds in bulk metal forming processes. However, the algorithm is only valid for two-dimensional models. In this work, the numerical approach is transferred to the three-dimensional case, to investigate the accuracy and validation of the previous results to establish a base for further investigations. The determined influences on the formation of forging folds are investigated for three-dimensional fold formation and compared with the experimental results. Further investigations on the factors, which lead to forging folds, were carried out numerically and experimentally. Here the numerical results were validated by means of metallographic microsection of the forged parts, whereby the material flow and the geometric characteristics of folds were considered. The results of this work serves as a basis for an automatic optimization of the process-parameters to prevent formation of forging folds. This will be realized by an optimization tool, which is nowadays integrated in commercial FE software systems. Thus, it should be possible to individually optimize the process, so that failures in parts can be avoided. Furthermore the results of this work serve also as basis for further investigations on a better friction modeling comparing classic friction models with the IFUM-friction model..
AB - On component-side the process limits of bulk metal forming processes are limited by defects in parts, like folds or cracks. Considering the time and cost aspect, the complexity of forged parts and the demands for quality are increasing. Therefore it is inalienable to detect failures in parts in earlier production process stages, to avoid additional costs and loss of time. In bulk metal forming processes forging folds, which predominantly occur at the equatorial section in upsetting processes of hollow parts, are less investigated in comparison with folds in sheet metal forming process. Some previous studies already showed the main influences on the formation of forging folds and process limits using processes, in which forging folds occur predominantly [1, 2, 3]. More studies were carried out on investigations with focus on numerical identifications of folds [1,4]. In one of these studies i.a. at the Institute of Forming Technology and Machines an algorithm was developed and implemented in a commercial FE-Software-System, which is able to detect forging folds in bulk metal forming processes. However, the algorithm is only valid for two-dimensional models. In this work, the numerical approach is transferred to the three-dimensional case, to investigate the accuracy and validation of the previous results to establish a base for further investigations. The determined influences on the formation of forging folds are investigated for three-dimensional fold formation and compared with the experimental results. Further investigations on the factors, which lead to forging folds, were carried out numerically and experimentally. Here the numerical results were validated by means of metallographic microsection of the forged parts, whereby the material flow and the geometric characteristics of folds were considered. The results of this work serves as a basis for an automatic optimization of the process-parameters to prevent formation of forging folds. This will be realized by an optimization tool, which is nowadays integrated in commercial FE software systems. Thus, it should be possible to individually optimize the process, so that failures in parts can be avoided. Furthermore the results of this work serve also as basis for further investigations on a better friction modeling comparing classic friction models with the IFUM-friction model..
KW - Bulk metal forming
KW - FEM
KW - Forging folds
UR - http://www.scopus.com/inward/record.url?scp=84902596864&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/kem.611-612.212
DO - 10.4028/www.scientific.net/kem.611-612.212
M3 - Conference contribution
AN - SCOPUS:84902596864
SN - 9783038351061
T3 - Key Engineering Materials
SP - 212
EP - 220
BT - Material Forming ESAFORM 2014
T2 - 17th Conference of the European Scientific Association on Material Forming, ESAFORM 2014
Y2 - 7 May 2014 through 9 May 2014
ER -